Emissivity spectra in five bins of temperature and their 1-σ uncertainty, assuming temperature mixing along the LOS (with the use of the Dale et al. (2001) model): 19.1 K in red (solid), 22.3 K in dark blue (dash), 25.5 K in light blue (dot), 28.7 K in green (dash-dot), and 31.9 K in orange (dash-dot-dot). The emissivities have been computed for the best-fit TLS model (top panel) and a modified black body with β = 2 (bottom panel). An emissivity power-law in λ^-2 is overplotted for comparison in continuous gray line.